The "<type>Coeffs" sub-dictionary is now optional for most model parameters

except turbulence and lagrangian which will also be updated shortly.

For example in the nonNewtonianIcoFoam offsetCylinder tutorial the viscosity
model coefficients may be specified in the corresponding "<type>Coeffs"
sub-dictionary:

transportModel  CrossPowerLaw;

CrossPowerLawCoeffs
{
    nu0         [0 2 -1 0 0 0 0]  0.01;
    nuInf       [0 2 -1 0 0 0 0]  10;
    m           [0 0 1 0 0 0 0]   0.4;
    n           [0 0 0 0 0 0 0]   3;
}

BirdCarreauCoeffs
{
    nu0         [0 2 -1 0 0 0 0]  1e-06;
    nuInf       [0 2 -1 0 0 0 0]  1e-06;
    k           [0 0 1 0 0 0 0]   0;
    n           [0 0 0 0 0 0 0]   1;
}

which allows a quick change between models, or using the simpler

transportModel  CrossPowerLaw;

nu0         [0 2 -1 0 0 0 0]  0.01;
nuInf       [0 2 -1 0 0 0 0]  10;
m           [0 0 1 0 0 0 0]   0.4;
n           [0 0 0 0 0 0 0]   3;

if quick switching between models is not required.

To support this more convenient parameter specification the inconsistent
specification of seedSampleSet in the streamLine and wallBoundedStreamLine
functionObjects had to be corrected from

    // Seeding method.
    seedSampleSet   uniform;  //cloud; //triSurfaceMeshPointSet;

    uniformCoeffs
    {
        type        uniform;
        axis        x;  //distance;

        // Note: tracks slightly offset so as not to be on a face
        start       (-1.001 -0.05 0.0011);
        end         (-1.001 -0.05 1.0011);
        nPoints     20;
    }

to the simpler

    // Seeding method.
    seedSampleSet
    {
        type        uniform;
        axis        x;  //distance;

        // Note: tracks slightly offset so as not to be on a face
        start       (-1.001 -0.05 0.0011);
        end         (-1.001 -0.05 1.0011);
        nPoints     20;
    }

which also support the "<type>Coeffs" form

    // Seeding method.
    seedSampleSet
    {
        type        uniform;

        uniformCoeffs
        {
            axis        x;  //distance;

            // Note: tracks slightly offset so as not to be on a face
            start       (-1.001 -0.05 0.0011);
            end         (-1.001 -0.05 1.0011);
            nPoints     20;
        }
    }

src/functionObjects/field/streamLine/streamLine.C

@@ -372,19 +372,17 @@ bool Foam::functionObjects::streamLine::read(const dictionary& dict)
     );
 
     cloudName_ = dict.lookupOrDefault<word>("cloudName", "streamLine");
-    dict.lookup("seedSampleSet") >> seedSet_;
 
     meshSearchPtr_.reset(new meshSearch(mesh_));
 
-    const dictionary& coeffsDict = dict.subDict(seedSet_ + "Coeffs");
     sampledSetPtr_ = sampledSet::New
     (
-        seedSet_,
+        "seedSampleSet",
         mesh_,
         meshSearchPtr_(),
-        coeffsDict
+        dict.subDict("seedSampleSet")
     );
-    coeffsDict.lookup("axis") >> sampledSetAxis_;
+    sampledSetAxis_ = sampledSetPtr_->axis();
 
     scalarFormatterPtr_ = writer<scalar>::New(dict.lookup("setFormat"));
     vectorFormatterPtr_ = writer<vector>::New(dict.lookup("setFormat"));

src/functionObjects/field/streamLine/streamLine.H

@@ -55,8 +55,7 @@ Description
         nSubCycle       5;
         cloudName       particleTracks;
 
-        seedSampleSet   uniform;
-        uniformCoeffs
+        seedSampleSet
         {
             type        uniform;
             axis        x;  //distance;
@@ -81,7 +80,7 @@ Usage
         seedSampleSet| Seeding method (see below)| yes       |
     \endtable
 
-    Where \c seedSampleSet is typically one of
+    Where \c seedSampleSet \c type is typically one of
     \plaintable
         uniform | uniform particle seeding
         cloud   | cloud of points

src/functionObjects/field/wallBoundedStreamLine/wallBoundedStreamLine.C

@@ -469,18 +469,15 @@ bool Foam::functionObjects::wallBoundedStreamLine::read(const dictionary& dict)
         "cloudName",
         "wallBoundedStreamLine"
     );
-    dict.lookup("seedSampleSet") >> seedSet_;
-
-    const dictionary& coeffsDict = dict.subDict(seedSet_ + "Coeffs");
 
     sampledSetPtr_ = sampledSet::New
     (
-        seedSet_,
+        "seedSampleSet",
         mesh_,
         meshSearchMeshObject::New(mesh_),
-        coeffsDict
+        dict.subDict("seedSampleSet")
     );
-    coeffsDict.lookup("axis") >> sampledSetAxis_;
+    sampledSetAxis_ = sampledSetPtr_->axis();
 
     scalarFormatterPtr_ = writer<scalar>::New(dict.lookup("setFormat"));
     vectorFormatterPtr_ = writer<vector>::New(dict.lookup("setFormat"));

src/functionObjects/field/wallBoundedStreamLine/wallBoundedStreamLine.H

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -56,8 +56,7 @@ Description
         nSubCycle       5;
         cloudName       particleTracks;
 
-        seedSampleSet   patchSeed;
-        patchSeedCoeffs
+        seedSampleSet
         {
             type        patchSeed;
             patches     (wall);
@@ -81,10 +80,10 @@ Usage
         seedSampleSet| Seeding method (see below)| yes       |
     \endtable
 
-    Where \c seedSampleSet is typically one of
+    Where \c seedSampleSet \c type is typically one of
     \plaintable
-        uniform | uniform particle seeding
-        cloud   | cloud of points
+        uniform   | uniform particle seeding
+        cloud     | cloud of points
         patchSeed | seeding via patch faces
         triSurfaceMeshPointSet | points according to a tri-surface mesh
     \endplaintable